Question

Distances in space are measured in light-years. The distance from Earth to a star is 6.8 × 1013 kilometers. What is the distance, in light-years, from Earth to the star (1 light-year = 9.46 × 1012 kilometers)? 2.66 light-years 7.18 light-years 7.74 light-years 9.46 light-years

Answer 1

$\dfrac{6.8\cdot 10^{13}}{9.46\cdot 10^{12}}=\dfrac{6.8}{9.46}\cdot 10\approx 7.188$
Answer: 7.18 light-years.

Answer 2

The star is 7.18 light years away from the earth.

Distance between earth and star is given = 6.8 x 10^13 km. This distance in light years to determine. Where 1 light-years = 9.46 x 10^12 km.

What is a light year?

A light year is a distance measuring unit in space.

Here,
Distance between earth and star = 6.8 X 10^13 km
                                                   =  6.8/9.4 x 10^13/10^12
                                                   =   0.718 x 10
                                                   =   7.18 Light years

Thus, the star is 7.18 light years away from the earth.

Learn more about light years here:
https://brainly.com/question/1302132

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